<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>面试题</title>
</head>
<body>
<script type="text/javascript">
    setTimeout(() => {
        console.log(0)
    }, 0)
    new Promise((resolve, reject) => {
        console.log(1)
        resolve()
    }).then(() => {
        console.log(2)
        new Promise((resolve, reject) => {
            console.log(3)
            resolve()
        }).then(() => {
            console.log(4)
        }).then(() => {
            console.log(5)
        })
    }).then(() => {
        console.log(6)
    })
    new Promise((resolve, reject) => {
        console.log(7)
        resolve()
    }).then(() => {
        console.log(8)
    })
    // 172384650
</script>
</body>
</html>
